So if you hit J to open quest log the far right tab on the top will have all your tutorials listed.
Right clicking on any creature will give a menu that has examine on it, if you wish to know what passives creatures have it'll be their. Also keep the right side combat log open, hovering over combat text on that will give more details.
There's a option in gameplay called Karmic Dice, it's suppose to even out the amount of failed rolls but from what I heard it screws you over.
Here's a quick bg3 builder I found a while back, its been pretty helpful personally:
https://eip.gg/bg3/build-planner/for who starts when on beginning of battle, its called initiative, if you hover over dexterity (dex) attribute it'll say it their. You can check it out while in combat by the middle top portraits, you can right click those and see npc and player attributes.
good luck
